1.   Solve sin x cos x - cos x = 0 for principal values of x. Express solutions in degrees.
    A. 30°, 60° B. 60°, 90°
    C. 150°, 90° D. 30°, 90°
    Hint

  2.   Solve 2 cos + 1 < 0 for 0 < 2.
    A. < < 2 B. < <
    C. < < D. 0 < or
< < 2
    Hint

  3.   Solve cos x - 1 = 0 for all real values of x.
    A. +2k, + 2k B. + k
    C. + 2k, +2k D. +2k, + 2k
    Hint

  4.   Solve 4 sin2 x + 3 = 4 for principal values of x. Express solutions in radians.
    A. -, B. ,
    C. , D. -,
    Hint

  5.   Solve + 1 = 2 sin x for all real values of x.
    A. + k B. + 2k
    C. k D. + 2k
    Hint